I own a 95 Mustang GT which as developed a problem which we can not figure out. The car doesn't get driven on a regular basis. When we do go to take it out, and it's been sitting for a couple of days, it has difficulty starting. It feels like a fuel problem as it sputters a couple of times and by the third or fourth try it finally starts and stays running. After that inial start it will be fine until the next time it sits for more than a day. Everything is new in the engine, full tune up, replaced the cold start valve, throttle possion sensor, fuel pressure regulator, fuel filter and injectors. Checked all the lines for leaks found none. Not getting any codes from the computer. Also cleaned the throttle body and replaced the EGR valve. Any advice out there?